/* 顶部导航栏 */

.mainnav {
    width: 100%;
    height: 70px;
    position: fixed;
    background-color: rgba(0, 0, 0, .1);
}

.main_box .col-md-1 {
    padding: 15px 0 15px 25px;
}

.main_box .col-md-2 button {
    margin: 20px 0;
    padding: 6px;
    border: 1px solid #ffffff;
    color: #ffffff;
    background-color: rgba(0, 0, 0, .1);
}

.main_box .col-md-9 ul {
    display: flex;
    justify-content: space-around;
}

.main_box .col-md-9 ul li {
    padding: 30px 20px 16px 20px;
}

.main_box .col-md-9 ul li:hover {
    border-bottom: 4px solid #ffffff;
}

.main_box .col-md-9 ul li a {
    text-decoration: none;
    color: #fff;
}


/* 头部 */

.header {
    width: 100%;
    background: url(../images/productimg/top_banner2.png) no-repeat;
    background-size: 100% 100%;
}

.header_content {
    color: #ffffff;
    text-align: center;
    padding: 110px 0;
}

.header_content h2 {
    font-size: 42px;
}

.header_content p {
    font-size: 16px;
    margin-top: 20px;
}


/* 当前位置 */

li {
    list-style: none;
}

.content {
    overflow: hidden;
}

.content_box ul li a {
    color: #666666;
    text-decoration: none;
}

.content_box ul {
    margin-top: 15px;
    display: flex;
}

.content_box ul li .content_box_chanpin {
    color: #333333;
}


/* 功能介绍 */

.function h2 {
    color: #707070;
    text-align: center;
    margin-top: 156px;
}

.function h2::after {
    display: block;
    content: '';
    width: 120px;
    height: 4px;
    margin: 21px auto;
    background-color: #468eff;
}

.function p {
    margin-top: 50px;
    color: #707070;
    padding: 61px 187px 31px 188px;
    box-shadow: 1px 1px 5px #c2c9d6;
}


/* 功能内容 */

.function_content {
    margin-top: 120px;
}

.function_content_img ul {
    margin-bottom: 50px;
}

.function_content_img ul li h4 {
    color: #707070;
    font-weight: 700;
}

.function_content_p {
    padding-top: 60px;
}

.function_content_img ul li p {
    font-size: 16px;
    color: #707070;
}

.function_content_img ul li .function_content_txt {
    color: #b5b5b5;
    margin-top: 50px;
}


/* 优化内容 */

.optimize {
    background-color: #f5f9ff;
}

.optimize_txt h2 {
    color: #707070;
    text-align: center;
    margin-top: 90px;
}

.optimize_txt h2::after {
    display: block;
    content: '';
    width: 120px;
    height: 4px;
    margin: 21px auto;
    background-color: #468eff;
}

.optimize_nav ul {
    margin-top: 50px;
    margin-bottom: 158px;
}

.optimize_nav ul li h4 {
    text-align: center;
    color: #ffffff;
    padding: 10px 20px;
    font-size: 24px;
    background-color: #468eff;
}

.optimize_nav ul li p {
    text-align: center;
    font-size: 18px;
    padding: 10px 0;
}

.optimize_nav ul li p a {
    color: #6fa7ff;
    text-decoration: none;
}


/* 服务流程 */

.serve_txt {
    position: relative;
    top: 0;
    left: 0;
    display: flex;
    justify-content: center;
    text-align: center;
}

.serve_content_img {
    margin-top: 60px;
    padding: 0 85px;
}

.serve_bottom {
    text-align: center;
    padding-bottom: 310px;
}

.serve_content_img:nth-child(odd) {
    padding-top: 50px;
}

@media(max-width:980px) {
    .serve {
        display: none;
    }
}


/* 底部 */

.footer {
    padding-bottom: 30px;
    background-color: #22263d;
}

.footer_txt ul {
    padding-left: 180px;
    display: flex;
}

.footer_txt ul li a {
    color: #bbbbbb;
    text-decoration: none;
}

.footer_txt ul li {
    color: #bbbbbb;
    padding: 40px 10px;
}

.footer_cnt {
    display: flex;
}

.footer_cnt div:nth-child(1) {
    padding-left: 180px;
    padding-top: 20px;
}

.footer_cnt div:nth-child(2) {
    padding-top: 30px;
}

.footer_cnt div:nth-child(2) ul li a {
    text-decoration: none;
    color: #bbbbbb;
}

.footer_cnt div:nth-child(3) {
    height: 80px;
    width: 1px;
    margin: 0 80px;
    background-color: #444444;
}

.footer_cnt div:nth-child(4) {
    text-align: center;
    color: #bbbbbb;
}

.footer_cnt ul {
    display: flex;
}

.footer_cnt ul li {
    padding: 0 20px;
}

.footer_bottom {
    display: flex;
    justify-content: center;
    color: #bbbbbb;
}


/* 底部显示和隐藏 */

@media(max-width:768px) {
    .footer {
        display: none;
    }
}

@media(min-width:768px) {
    .footer {
        display: none;
    }
}

@media(min-width:1200px) {
    .footer {
        display: block;
    }
}